Derrick construction



Sept. 14 1926. L599j742 B. B LACK DERRICK CONSTRUCTION Filed DeC- 2l.1925 2 Sheetsshee1- 1 Sept. /14 1926.

2 Sheets-Sheet 2 IN VEN TOR.

M ATTORNEY Patented Sept. 14, 1926.

UNITED STATES PATENT l'FlCE.L

BURTON BLACK, OF REDONDG BEACH, CALIFORNIA, I'SSIGNOR 0F.0l\TE-SI15.TH IFREDERICK L. FEISTIIAMEL, ONE-SIXTH TO .ARTHUR J. CARR, AND 0NE.IXT1-IIG THOMAS A. COLLINS, ALL 0F LOS ANGELES, CALIFORNIA.

DERRIGK CONSTRUCTION.

Application4 filed December 21, 1925. Serial No. 76,846.

This invention relates to improvements in derriclr construction, and isparticularly di rected to the general type of derrick structuresusuallyemployed in the drilling and operating of oil, gas and likewells.

lvIore specifically, the present invention is directed to certainimprovements in the conn struction of the type of panel derriclrdisclosed in my copending application, Serial No. 68,208, filed November10, 1925, and has for an object to provide an improved method ofconstructing the several panels so as to permit a closer intermeshing ofthe several adjacent panels at the corners of the derriclc. and so as toprovide more rigid corner posts or legs.

It is a further object to so construct the several panel sections of thederrick so that in the assembled derrick thev girts anc braces will beclamped between the adjacent leg members. Various other objects andadvantages will be more fully apparent from the following description ofthe accompanying drawings which form a part of this disclosure, andwhich illustrate a preferred form of the embodiment of the invention.

Of the drawings:

Fig. 1 is an elevation of aderrick of the general type to which thepresent invention is directed.

, Fig. 2 is an enlarged plan section, partly broken, taken on line 2-2of Fig. 1. j

Fig. 3 is 'an elevation of asingle panel section of the form utilized intwo opposite sides of the derrick 'y Fig. 4 "is a similar elevation of asingle panel section of the form utilized in the other two sides of thederrick.

j Fig. 5 is an enlarged detailed section taken on line 5 5 of Fig. 1.

In the construction disclosed in my pre vious application, aboveidentified, the several girtsand sway braces of each panel section aresecured to the respective angle iron leg members by bolts or rivetshaving projecting heads, and in such a manner that when the adjacentsections .are assembled with the angle-iron leg members of said sec'-tions in intermeshing relation, said angleiron leg members clamp againstthe adjacent bolt or rivet heads.

In certain instances it has been found that it is more desirable to soconstruct the panel sections that When assembled together in a derriclr,the ends of the several girts and sway braces will be directly engagedby and be clamped rigidly between the two angle-- iron leg members ateach corner of the derrick, this being most effectively accomplished bysecuring the girts and braces to the respective leg members by bolts orrivets having countersunk heads.

In a derrick of this general type of construction, each of the foursides is formed of a plurality of panel sections secured together invertical alignment with the several sections of the respective sides ofsuitable dimensions to produce a completed derrick gradually convergingor tapering upwardly to the derrick top.

The panel sections A (see Fig. ll) of two opposite sides of the derriclrare of relatively similar construction and the panel sections B (seeFig. 3) are also of relatively similar construction, but slightlydifferent from the panel sections A; thereforeit will suiiice herein todescribe in detail onlyone of each of the sections A and B.

Each panel section A comprises opposite angle-iron leg members adisposed vertically at slightly converging angles corresponding to thegeneral taper of the completed derrick, lower and upper transversemarginal girts 2 and 3 (so-called because they forni the lower and uppermargins of the panel), an'intermediate transverse girt 4, a lower pairof diagonal sway braces 5 and 6, and an upper pair of similar diagonalsway braces 7 and 8, there being also provided vertical reinforcingbraces 9 if desired.v These girts and braces may be formed of angle-ironand swaged at their opposite ends to bring both flanges thereof toparallel Contact, thus providing securing ends of double thickness orthey may be formed of fiat or other shaped material. rIhe opposite endsof the respective girts and braces are bored or punched to receive thesecuring bolts or rivets and are positioned to engage the inner faces ofthe adjacent flanges of the respective leg members a, said girts andbraces being secured in place preferably by bolts and nuts with the boltheads counter-- sunk into the inner surfaces ofthe respective girts andbraces and the associated nuts tightened against the outer faces of therespective ,leg members. (See particularly ico Fig. 2.) These severalbolts are designated by reference characters consisting of a suffixadded to the numeral designating the 'respective parts they secure tothe leg members, thus bolts 2a secure the transverse marginal girt 2 tothe lower ends of the leg members a, the bolts 3a secure the transversemarginal girt 3 to the upper ends 'ot said leg members, while the boltses, 5a, 6a, 7 and 8qu secure the intermediate girt and respectivediagonal sway braces to said leg members.

nach panel section s comprises Opposite angle-'iron leg members o, lowerand upper transverse marginal girts l0 and ll, an intermediate tranversegirt l2,a lowe'r pair ot'diagonal sway braces 13 and le, an upper pairot diagonal sway braces l5 and lo, and vertical reinforcing/'braces il?,ijt desired. All of these girts and braces are or' the same constructionas Ythose ot the panel section il.. Howeventheir ends are secured bybolts and nuts to the outer faces of the adjacent flanges voit therespective leg members b, instead ot to the yinner faces `as are thegirts and braces ot the sections A, the headsol' said bolts beingcounter-sunk into the outer surfaces of the respective "gir-ts andbraces and the associated nuts tightened against the inner faces ot therespective leg members. (See Fig. 2.) Bolts l0 vsecure the lowermarginal girt lO to the lower 'ends of the respective leg members b,bolts lli secure the upper marginal girt ll to the upzp'ei' ends of therespective leg members 5 while bolts 12a, 13a, la?, l5u and lGL securethe intermediate girt l2 and the respective diagonal sway braces to theleg members Z).

"Withparticular `reference to Figs. l and 5, it will be noted that inthe co'nrpleted derrick the several panel sections comprising each sideof the derrick are vertically aligned one upon the other with the lowermarginal girt of each section engaging the upper marginal girt of thenext lower section and that the coengaging marginal girtts are securedtogether by bolts 1S.` As shown in Fig. 5,7the adjacent A and sectionsoverlap ,eachother lby one-halfl their respective heights, thus bringingthe joints 19 between the vertically adjacent A sections in regularstaggered 'relation to the joints 2O between theA vertically adjacent Bsections.

Referring now more particularly to Fig. 2 oi" the drawings, it will benoted that the panel sections il are assembled with the panel sections Bso that the angle-iron leg members a have an intermeshing or overlappingengagement with the angle-iron leg members?) of the panel sections B,and Ythat the linner flat surfaces of ythe ends of respective girts andbraces ot the sections A engage the outer 4faces jot' the leg members oof the sections B, while the outer flat surfaces of the ends of therespective girts and braces of the sections B engage the inner faces 'ofthe leg members 'a ot the sections A. rl"hu`s when the leg members aresecured together, as will be explained, 'the ends of the Vgirts andbraces will be 'rigidly clamped between the companion leg members ateach corner of the derriclr. rlhis distinguishes from the constructiondisclosed in my previous application in which the leg members clampedagainst both heads and not against the ends ot' the girts and braces,and is of material importance in preventing a shearing of the bolts byreason of excessive vibra'- tion and in producing 'a 'more rigid anddurable construction. y

l 'VVit-h the panel sections thus assembled, the nested leg members 'aresecured together at intervals by bolts A and B', 'each of said boltsextending `through apertures 2l in the flanges of both leg members a and'Z9 "of each corner post ol'1 the derriclr. l Y

From the above it 'will be seen that the present invention provides aderrick c'onstruction having corner legs each lconsisting of twointeimeshing angle-iron lieg r'nientbers, and connected braces and girtsarranged to be rigidly clamped between and secured to said leg membersvso 'as to relieve the securing bolts ol detrimental vibratoryinfluences and providing a very rigid and durable construction. y

While the specilic embodiment here-in illustrated `and described ifsfully capable ot 'uliilling the objects primarily'7 stated it to be'understood that l do not wish to re'- st'rict the invention in thisregard, for is susceptible 'of 'embodiment in various other forms, allcoming within the scope oi the claims which follow. Y

I claimk as 'my invention: i

1. In a derril; of the nature disclse'd, the combination of: relativelyspaced corner legs each compri'sing` a double string of longitudinally'aligned leg members; transverse g'irts and braces forming therespective sides 'of the derrick and having their opposite ends disposedbetween the adjacent companion leg members; and Vmeans ttor clampingsaid girts and `braces between 'said leg members. y l t Q. In a derrickol the nature disclosed, the combination of:l relatively spaced corner,legs each comprising a 'double string ot longitudinally alignedangle-iron le'g inembers, one string nested within the 'other with theirlflanges in parallel relationship with the adjacent sides 'of 'thederricl; transverse girts and braces forming the respectivevsides of thederrifcl; 'and having ltheir opposite ends disposed between the1Jflanges 'ofthe adjacent leg members; an'dlmeans lor ldrawing said iegmembers together 'tio clamp said girts and braces.

3. In a derrcl'z of the 'nature disclosed', the combination of:relatively spaced corner Cfl lil)

legs each comprising a double string of longitudinally aligned legmembers; transverse girts and braces forming the respective sides of thederrick and having their opposite ends disposed between and in contactwith the adjacent companion leg members and secured to one of said legmembers; and means for drawing said leg members together to clamp saidgir-ts and braces.

il. In a derrick of the nature disclosed, the combination of:Vrelatively spaced corner legs each comprising a double string oflongitudinally aligned angle-iron leg members, one string nested withinthe other with their flanges in parallel relationship with the adjacentsides of the derriclr; transverse girts and braces forming therespective sides of the derrick and having their opposite ends disposedbetween and in Contact with the flanges of the adjacent leg members andsecured to the flange of one of said leg members; and means for drawingsaid leg members together to clamp said girts and braces. I

5. In a derrick of the nature disclosed, the combination of: relativelyspaced corner legs each comprising a double string of longitudinallyaligned angle-iron leg members, one string nested within the other withtheir fianges inparallel relationship with the adjacentsides f thederriclr; transverse girts and braces forming the respective sides ofthe derriclr and having their opposite ends disposed between the flangesof the adjacent leg members, the girts and braces of two opposite sidesof the derrick being secured to the outer faces of the adjacent flangesof the inner leg members and the girts and braces of the two other sidesof the derrick being secured to the inner faces of the adjacent fiangesof the outer leg members; and means engaging through both flanges of theseveral leg members for drawing them together to clamp' the girts andbraces.

6. ln a derrick of the nature disclosed, the combination of: relativelyspaced corner legs each comprising a double string of longi tudinallyaligned leg members; transverse girts and braces forming the respectivesides of the. derrick and having their opposite ends disposed betweenand in contact with the adjacent companion leg members, said girts andbraces being secured at each end to one of said leg members by acountersunk bolt; .and means for drawing said leg members together torigidly clamp said girts and braces.

7. A derrick having double leg members; girts having their ends disposedbetween said leg members and secured to one end thereof; and means fordrawing said leg members together to rigidly clamp said girts.k 8. Aderriclr having double leg members; girts having their ends disposedbetween said leg members and secured to one end thereof by countersunkbolts so as to permit the companion leg member to contact said girts;and means for drawing said leg mem`- bers together to rigidly clamp saidgirts.

lIn testimony whereof, I have hereunto set my hand at Los Angeles,California, thisl th day of December, 1925.

BURTON BLACK.

